I actually see Spyro being done a lot when people have a "retro games" play through. Heck I remember having someone comment on my channel for me to play Spyro before.
What's been suggested is good advice, all I can add to it is don't forget to share your videos and channel on social media sites like twitter, facebook, google +, pinterest, tumblr, etc. I noticed you don't have any social media links in your sig so I'm just assuming.
And when I say use them, do NOT just post a link to your video and just say something like "Check out this video *link*" and be done with it. Just like on these forums, you have to be active, talk to people with similar interests, and if they like you, they might just check out your channel and if they really like you, they will share it with their followers too.
Also, try being active on other forums too, YTTalk is a great start, but not EVERYONE here is going to be interested in looking at your channel. Maybe try posting around the minecraft forums, or other gaming related forums that are more likely to check out your channel.
Oh and for YTTalk don't forget VIP status lets you share videos in your signature and post in the video section which also helps
Here is an example of a good forums that you could join